Small annoyance with COPY FROM

Hi all,

Not really a big issue, but just something which catches me out
sometimes and I'm not sure if it's just me. When I want to import data
from a CSV file I write the below:

COPY temp_import_table
FROM 'X:/aerasense_12-7-2012.csv' DELIMITERS ',' CSV HEAD

But get the error:

ERROR:  could not open file "X:/aerasense_12-7-2012.csv" for reading:
No such file or directory

However when I move the file to within the PostgreSQL directory of my
C: drive it works fine:

COPY temp_import_table
FROM 'C:/Program Files
(x86)/PostgreSQL/9.0/data/aerasense_12-7-2012.csv' DELIMITERS ',' CSV
HEADER;

Am I doing something wrong, or can PostgreSQL only import data from
it's own directory?

Thanks

James